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CVE-2026-73846— CKAN MCP Server: Cache-key canonicalization collision enables cache confusion / poisoning

Quick assessment

Affected
ondata ckan-mcp-server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

onData CKAN MCP Server是onData组织开源的一款基于模型上下文协议的数据服务组件。 onData CKAN MCP Server 0.4.112之前版本存在安全漏洞，该漏洞源于src/utils/cache.ts中的canonicalizeParams函数在序列化请求参数时未转义&、=和

CVSS 6.5 · Medium EPSS 0.19% · P8

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
ondata ckan-mcp-server < 0.4.112 affected
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I. Basic Information for CVE-2026-73846

Vulnerability Information
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Vulnerability Title
CKAN MCP Server: Cache-key canonicalization collision enables cache confusion / poisoning
Source: CVE Program / CVE List V5
Vulnerability Description
CKAN MCP Server is a tool for querying CKAN open data portals. Prior to 0.4.112, canonicalizeParams in src/utils/cache.ts serializes request parameters with unescaped ampersand, equals-sign, and vertical-bar delimiters, allowing different logical parameter sets used by buildCacheKey to collide and an attacker to prime a shared cache with a response for a victim's distinct query. This issue is fixed in version 0.4.112.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对数据真实性的验证不充分
Source: CVE Program / CVE List V5
Vulnerability Title
onData CKAN MCP Server 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
onData CKAN MCP Server是onData组织开源的一款基于模型上下文协议的数据服务组件。 onData CKAN MCP Server 0.4.112之前版本存在安全漏洞，该漏洞源于src/utils/cache.ts中的canonicalizeParams函数在序列化请求参数时未转义&、=和|分隔符，导致buildCacheKey使用的不同逻辑参数集发生冲突，攻击者可能利用共享缓存为受害者的不同查询提供响应。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ondata ckan-mcp-server < 0.4.112 -

II. Public POCs for CVE-2026-73846

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III. Intelligence Information for CVE-2026-73846

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Patches & Fixes for CVE-2026-73846 (2)

Vendor Advisories for CVE-2026-73846 (1)

Same Patch Batch · ondata · 2026-08-14 · 3 CVEs total

CVE-2026-73845 5.3 MEDIUM CKAN MCP Server: MQA server allowlist bypass via unanchored regex (`isValidMqaServer`)
CVE-2026-73844 3.7 LOW CKAN MCP Server: Information disclosure via verbose error reflection

IV. Related Vulnerabilities

Same product: ckan-mcp-server
Same vendor: ondata
Same weakness: CWE-345

V. Comments for CVE-2026-73846

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